TY - GEN
T1 - Time reversal focusing of short pulses
AU - Fillinger, Laurent
AU - Sutin, Alexander
AU - Sarvazyan, Armen
PY - 2007
Y1 - 2007
N2 - Time Reversal Acoustics (TRA) provides a way to focus ultrasound in space and time. Standard TRA focusing system produces tone burst signal with a frequency band limited by the bandwidth of the transducer. For certain medical applications, both in therapy and imaging, a wider bandwidth is required. The goal of this study was to explore a possibility to generate shorter pulses less affected by the limited bandwidth of the transducers of the TRA focusing system. We proposed and tested a technique named "pseudo impulse response (pIR) method" which provides significant extension of the TRA focusing system bandwidth. In addition, the suggested method leads to a decrease of the spatial side lobes and also facilitates the task of creating multiple ultrasound foci.
AB - Time Reversal Acoustics (TRA) provides a way to focus ultrasound in space and time. Standard TRA focusing system produces tone burst signal with a frequency band limited by the bandwidth of the transducer. For certain medical applications, both in therapy and imaging, a wider bandwidth is required. The goal of this study was to explore a possibility to generate shorter pulses less affected by the limited bandwidth of the transducers of the TRA focusing system. We proposed and tested a technique named "pseudo impulse response (pIR) method" which provides significant extension of the TRA focusing system bandwidth. In addition, the suggested method leads to a decrease of the spatial side lobes and also facilitates the task of creating multiple ultrasound foci.
KW - Focusing
KW - Pseudo impulse response
KW - Short pulse
KW - Time reversal acoustic
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U2 - 10.1109/ULTSYM.2007.66
DO - 10.1109/ULTSYM.2007.66
M3 - Conference contribution
AN - SCOPUS:48149088284
SN - 1424413834
SN - 9781424413836
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 220
EP - 223
BT - 2007 IEEE Ultrasonics Symposium Proceedings, IUS
T2 - 2007 IEEE Ultrasonics Symposium, IUS
Y2 - 28 October 2007 through 31 October 2007
ER -